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Message-ID: <10845a340805220458i3f44bdf0p4d9d3f452ebc5c32@mail.gmail.com>
Date: Thu, 22 May 2008 12:58:19 +0100
Reply-To: RQuadling@GoogleMail.com
To: "Stan Vassilev | FM" <sv_forums@fmethod.com>
Cc: internals@lists.php.net
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Subject: [PHP-DEV] Getting Default Values via reflection.
From: rquadling@googlemail.com ("Richard Quadling")

2008/5/22 Stan Vassilev | FM <sv_forums@fmethod.com>:
>
> Hi,
>
> Actually PHP ignores default values on parameters followed by required ones.
> You can't fetch the default value even via Reflection.
> This is easily detected at compile time so I wonder why the compiler doesn't
> warn.
>
> Regards,
> Stan Vassilev

I'm not sure this is what you mean, but I use the following function
in my debugging logic.

<?php
function getArgs($s_Function, array $a_PassedParams = array()) {
  $a_Arguments = array();
  if ('' !== $s_Function) {
    $rf_This = new ReflectionFunction($s_Function);
    foreach($rf_This->getParameters() as $i_Param => $rp_Param) {
      $a_Arguments[$rp_Param->getName()] = $i_Param <
count($a_PassedParams) ? $a_PassedParams[$i_Param] :
$rp_Param->getDefaultValue() . ' (Default)';
    }
  }
  return $a_Arguments;
}

function foo($required, $optional = 'snafu', $also_optional = 'sins') {
  print_r(getArgss(__FUNCTION__, func_get_args()));
}

foo('fred');
foo('bob', 'jim');

outputs ...

Array
(
    [required] => fred
    [optional] => snafu (Default)
    [also_optional] => sins (Default)
)
Array
(
    [required] => bob
    [optional] => jim
    [also_optional] => sins (Default)
)

-- 
-----
Richard Quadling
Zend Certified Engineer : http://zend.com/zce.php?c=ZEND002498&r=213474731
"Standing on the shoulders of some very clever giants!"